Sash-fastener



(No Model.)'

E. SHERWOOD.

SASH FASTENER.

No. 359,183. Patented Mar. 8, 1887.

UNITED STATES PATENT OFFICE.

EUGENE SHER\VOOD, OF SAN FRANCISCO, CALIFORNIA.

SASH -FASTENER.

SPECIFICATION forming part of Letters Patent No. 359,183, dated March 8,1887.

Application filed December 1, 1886. Serial No. 220,413. (No model.)

To all whom, it may concern.-

Beit known that I, EUGENE SHERWOOD, of the city and county of SanFrancisco, and State of California, have invented an Improvement inSash-Locks; and I hereby declare the following to be a full, clear, andexact descrip tion thereof.

My invention relates to the class of locks or fastenings applied to thesashes of windows for the purpose of securing them, whereby they cannotbe opened from without, thus preventing an unlawful entry.

My invention consists in a bolt seated in one sash and adapted to engagethe other, said bolthaving a rack-stem, an operatingpin, also seated inthe first sash and influenced by a spring, said pin having a rack-stein,and a pinion engaged on opposite sides by the rackstems of both bolt andpin, whereby the movement of the latter effects a reverse or oppositemovement of the former. These main features of my invention, togetherwith details of construction and arrangement, I shall hereinafter morefully describe.

The object of my invention is to provide a simple and effectivesash-lock-one which accomplishes its locking automatically, which can bereadily released from within, and which will resist all tampering fromwithout.

Referring to the accompanying drawings, Figure 1 is averticalcross-section through the meeting-rails of the two sashes, showing theapplication of my lock thereto; Fig. 2 is a longitudinal section of thecasing D, showing the internal mechanism of the look.

A is the bolt, having a rack-stem, a, and a head, a. B is theoperating-pin, having a rack-stem, b, a head or button, I), and acontrolling-spring, b". O is a centrally-pivoted pinion meshing onopposite sides with the rack-stems a and I). These parts are mounted ina casing, D, in such a manner that the head a of the bolt projects fromone end. The button I) of the pin projects from the other end. Thespring 12 is seated between the inner shoulder of the button I) and ashoulder in the easing, and the pinion is pivoted in the casing betweenthe two rack-stems.

It will be seen that the effect of the spring b is to hold the bolt andpin projected from each end. Now, if the button b be pressed in, themotion transmitted through the two rackstems and the intervening pinionwill cause the retraction of the head a of the bolt. Upon relieving thebutton from pressure the spring will at once project it, and thus effectthe projection of the head of the bolt.

meeting-rail of the upper window-sash, and F is the meeting-rail of thelower window-sash. The casing D, with its internal mechanism, is lettransversely through the meeting-rail of the lowersash at somepointinits length, preferably midway. The button end is on the inside,while the bolt-head end is adjacent to the meeting-rail of the uppersash, into a socket in which it fits. This socket e is a metal plate letinto the meeting-rail E and secured by screws. Ithas also an upperbeveled portion, 6, to receive the contact of and to guide the header ofthe bolt in coming to its engagement, the said head being also beveled,after the manner of an ordinary lock-latch. The casing D is secured toits place by means of screws through the wings of a cap-piece, (1,formed either separate from or integral with the casing. In the underside of the bolthead is made a small notch, a", which, when the boltisin position, lies just above the space between themeeting-rails of thesashes. This notch is for the purpose of receiving an instrument passedup between the two rails with intent to force the bolt back, and itavoids this result by preventing the movement of the instrument eitherway and guarding the beveled surface of the bolt-head.

The operation of my sash-lock is as follows: Whenever the two sashes arebrought to their closed position the bolt-head a engages the socket eautomatically. The advantage of this is that the lock is effectivewithout calling for the exercise of the least attention on the part ofthe person closing the window. This avoids the sometimes serious resultof the carelessness of domestics. In order to open the window, thebutton I) is pressed in,whereby the bolt-head a is withdrawn from itsengagement with the socket e. The advantage of this reverse movement ofthe bolt and pin is that the required inward movement of the pin,effected by pressure on its buttonhead, is the most natural one. Buttonsare usually arranged to be pressed inwardly, and this is the mostconvenient way of operating The application of the lock is thus: E isthe them, the pressure being instinctively resorted to. It would be mostawkward to draw the bolt directly back; but in this construction thereis also the advantage of a gain in applying the power through the racksand pinion, thus rendering the look easy of operation. The socket 6,being formed of a metal plate, effectually prevents the passage throughthe rail E from the outside of a gimlet inserted with the intention offorcing the bolt baclgand the beveled head a of the bolt, being guardedcessible from within, said pin having a rack, stem, and a pinionengaging with opposite sides of the two rack-stems, whereby the movementof the pin in one direction effects a reverse movement of the bolt,substantially as described.

2. In a sash-loek, the spring-actuated bolt in the meetingrail of onesash controllable from within, said bolt having a beveled head, a, witha notch, (L in its under surface, in combination with the socket-plate ein the meeting-rail of the other sash, with which the bolt-head engages,substantially as and for the purpose herein described.

In witness whereof I have hereunto set my hand.

EUGENE SHERXVOOD.

\Vitnesses:

.TAMEs L. KING, WM. F. BOOTH.

